class Cat:

    def __init__(self, name):
        self.name = name

    @classmethod
    def speak(cls):
        print('shout~~~~~~~~~~~')

    def miao(self):
        print('miao~~~~~~~~~~~~')

cat = Cat('小白')
print(cat.name)
cat.miao()
# print(Cat.name)#实例属性不能通过类调用
# Cat.miao()
cat.speak()